That is certainly the case with regard to the time at which the withdrawal of a reservation became operative, which it is certainly preferable to specify whenever the application of the principle set forth in article 22, paragraph 3 (a), of the Vienna Conventions and also contained in draft guideline 2.5.8 might give rise to difficulties, either because the relative suddenness with which the withdrawal takes effect might put the other parties in an awkward position or, on the contrary, because there is a desire to neutralize the length of time elapsing before notification of withdrawal is received by them.
Así ocurre cuando se trata de la fecha del retiro de las reservas, que sin duda es preferible regular expresamente en todos los casos en que la aplicación del principio enunciado en el apartado a) del párrafo 3 del artículo 22 de las Convenciones de Viena y recogido en la directriz 2.5.8 podría plantear problemas, sea porque la relativa brutalidad de la aplicación del retiro podría plantear dificultades a las otras Partes, sea, por el contrario, porque se quiera neutralizar la demora debida a la recepción de la notificación del retiro por esas Partes.